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I know it depends on several factors but I want to confirm how much boost have you ever go with forged RB26 engine with stock crankshaft ?

I mean forged pistons, rods, race bearing, valves, etc....

i used to run 34psi on my old unprepped stock crank (late R32 crank...same as R33) in dyno comps...28psi at the track. 10.34 @ 134 MPH

i also ran 25psi on my new prepped R33 crank when racing and dyno (500AWKW) 9.95 @ 139 MPH

i will now run 35psi on my old prepped R33 crank when racing and dyno (660+AWKW) Hopefully 8.99 @ 152 MPH

Mark Jacobsen runs 40psi in his racecar with std crank on methanol and runs 7.84 @ 184 MPH

Marks dyno R34 runs 45psi on stock crank and makes 1350awhp.

i think your stock crank will be fine.

Edited by DiRTgarage

OP clearly doesn't understand how boost vs cfm vs hp works.

PSI has nothing to do with anything other than what a certain kind of gasoline can support at a certain compression ratio. Compare the hp a T88 makes at 1.2 bar vs a stock turbo at 1.2 bar. Comprende?

i used to run 34psi on my old unprepped stock crank (late R32 crank...same as R33) in dyno comps...28psi at the track. 10.34 @ 134 MPH

i also ran 25psi on my new prepped R33 crank when racing and dyno (500AWKW) 9.95 @ 139 MPH

i will now run 35psi on my old prepped R33 crank when racing and dyno (660+AWKW) Hopefully 8.99 @ 152 MPH

Mark Jacobsen runs 40psi in his racecar with std crank on methanol and runs 7.84 @ 184 MPH

Marks dyno R34 runs 45psi on stock crank and makes 1350awhp.

i think your stock crank will be fine.

Many thanks for your response.

I hope all the users could learn from somebody like you.

OP clearly doesn't understand how boost vs cfm vs hp works.

PSI has nothing to do with anything other than what a certain kind of gasoline can support at a certain compression ratio. Compare the hp a T88 makes at 1.2 bar vs a stock turbo at 1.2 bar. Comprende?

Probably if I ask how much hp ? RB26 Crankshaft ..... only will receive one response 1350whp now thanks to DirtGarage response I won a local discussion between friends... Capici ?

have fun :)

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